“What we do not do, as we have said many times, is use our foreign intelligence capabilities to steal the trade secrets of foreign companies on behalf of — or give intelligence we collect to — U.S. companies to enhance their international competitiveness or increase their bottom line,” he said.

To prove Clapper is lying Greenwald would have to show a pretty obvious dotted line from the NSA to US oil companies, or at least US hedge funds. Otherwise, it’s entirely possible the US is spying on foreign companies but for the same reason the CIA tracks economic growth of nations around the world – simply to get a fuller picture of the world. You can learn a lot about a country’s politics by looking at its business and economics.